DI Server Installation and connection

We've installed <b>DI Server</b>, started it, but the <b>WSClient</b> file comming with the installation doesn't work.

a) Is the <b>IIS</b> needed for the DIServer to work?

If not, what do I need to do to be able to connect to the DIServer. There's no <b>WSDL</b> file with the DIServer.

b) Do I need to create my own <b>WSDL</b> file and put it on a Web folder?

I say this because I'm trying to connect with PHP to the server and PEARClient from PHP needs an URL (normally the WSDL file) to connect. It's just too confusing and there is no much help in the documentation.